robin.thoni/ipxe - git rthoni.com

Michael Brown 66e7619099 [retry] Process at most one timer's expiry in each call to retry_step() Calling a timer's expiry method may cause arbitrary consequences, including arbitrary modifications of the list of retry timers. list_for_each_entry_safe() guards against only deletion of the current list entry; it provides no protection against other list modifications. In particular, if a timer's expiry method causes the subsequent timer in the list to be deleted, then the next loop iteration will access a timer that may no longer exist. This is a particularly nasty bug, since absolutely none of the list-manipulation or reference-counting assertion checks will be triggered. (The first assertion failure happens on the next iteration through list_for_each_entry(), showing that the list has become corrupted but providing no clue as to when this happened.) Fix by stopping traversal of the list of retry timers as soon as we hit an expired timer. Signed-off-by: Michael Brown <mcb30@ipxe.org>		13 роки тому
contrib	[contrib] Remove extraneous errcodedb files	13 роки тому
src	[retry] Process at most one timer's expiry in each call to retry_step()	13 роки тому
COPYING	Initial revision	19 роки тому
COPYRIGHTS	[build] Rename gPXE to iPXE	14 роки тому
README	[doc] Re-add README file	14 роки тому

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org